An atom has 26 protons, 26 electrons, and 30 neutrons. find the mass number.

a. 26

b. 30

c. 52

d. 56

e. 82

What is a substance that is ductile?

Use mass number in a sentence

What does a formation equation show

Which of the following are considered pure substances? element compound homogeneous mixture heterogeneous mixture

Which physical property is used to test the purity of a metal? A. hardness B. density C. viscosity D. malleability

Describe two important functions for carbon dioxide in the atmosphere.

In the chemical reaction: 2 h 2 (g) o2 (g) → 2 h2o (g), with 8 grams of h 2 (2 grams/mole) and 16 grams of o2 (32 grams/mole) and the reaction goes to completion, what is the excess reactant and how much of that would remain

What is the volume of a gold nugget that weighs 2.20 kg? The density of gold is 19.28 g/cc.

Find the percentage composition of carbon in H5C2O

When studying atoms, scientists can ignore the force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom.